<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>座机号验证</title>
</head>

<body>
  <script>
    // 010-12345678   或者 0101-1234567
    // 正则里面的或者 符号  |  
    // var reg = /^\d{3}-\d{8}|\d{4}-\d{7}$/;
    var reg = /^\d{3,4}-\d{7,8}$/
  </script>
</body>

</html>